Recent Earthquakes in California and Nevada
== PRELIMINARY EARTHQUAKE REPORT ==
U.S. Geological Survey, Menlo Park, California
U.C. Berkeley Seismological Laboratory, Berkeley, California
Version #0: This report supersedes any earlier reports of this event. This is a computer-generated message. This event has not yet been reviewed by a seismologist.
A micro earthquake occurred at 3:44:23 AM (PST) on Sunday, December 21, 2025.
The magnitude 1.1 event occurred 9 km (6 miles) W of The Geysers, CA.
The hypocentral depth is 4 km ( 3 miles).
| Magnitude | 1.1 - duration magnitude (Md) |
| Time | Sunday, December 21, 2025 at 3:44:23 AM (PST) Sunday, December 21, 2025 at 11:44:23 (UTC) |
| Distance from |
The Geysers, CA - 9 km (6 miles) W (263 degrees) Cobb, CA - 13 km (8 miles) WSW (243 degrees) Cloverdale, CA - 14 km (9 miles) ESE (107 degrees) Healdsburg, CA - 18 km (11 miles) N (3 degrees) Middletown, CA - 21 km (13 miles) W (275 degrees) |
| Coordinates | 38 deg. 46.1 min. N (38.768N), 122 deg. 51.5 min. W (122.858W) |
| Depth | 4.30 km (2.70 miles) |
| Quality | Fair |
| Location Quality Parameters | Nst=11, Nph=11, Dmin=1.0 km, Rmss=0.03 sec, Erho=0.62 km, Erzz=0.829999983 km, Gp=194 degrees |
| Event ID# | nc75283971 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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